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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2014 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: Diffs.html 842 2015-03-07 18:20:42Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.jsimpledb.util;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import java.util.Arrays;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import java.util.LinkedHashMap;<a name="line.11"></a>
<span class="sourceLineNo">012</span>import java.util.Map;<a name="line.12"></a>
<span class="sourceLineNo">013</span>import java.util.regex.Matcher;<a name="line.13"></a>
<span class="sourceLineNo">014</span><a name="line.14"></a>
<span class="sourceLineNo">015</span>/**<a name="line.15"></a>
<span class="sourceLineNo">016</span> * Used to report difference(s) between two hierarchical structures.<a name="line.16"></a>
<span class="sourceLineNo">017</span> *<a name="line.17"></a>
<span class="sourceLineNo">018</span> * &lt;p&gt;<a name="line.18"></a>
<span class="sourceLineNo">019</span> * Each individual difference is a {@link String} (map key) and has optional further detail contained in another<a name="line.19"></a>
<span class="sourceLineNo">020</span> * {@link Diffs} instance (map value, or null for none). Keys must not be null.<a name="line.20"></a>
<span class="sourceLineNo">021</span> * &lt;/p&gt;<a name="line.21"></a>
<span class="sourceLineNo">022</span> */<a name="line.22"></a>
<span class="sourceLineNo">023</span>@SuppressWarnings("serial")<a name="line.23"></a>
<span class="sourceLineNo">024</span>public class Diffs extends LinkedHashMap&lt;String, Diffs&gt; {<a name="line.24"></a>
<span class="sourceLineNo">025</span><a name="line.25"></a>
<span class="sourceLineNo">026</span>    /**<a name="line.26"></a>
<span class="sourceLineNo">027</span>     * Default constructor.<a name="line.27"></a>
<span class="sourceLineNo">028</span>     */<a name="line.28"></a>
<span class="sourceLineNo">029</span>    public Diffs() {<a name="line.29"></a>
<span class="sourceLineNo">030</span>    }<a name="line.30"></a>
<span class="sourceLineNo">031</span><a name="line.31"></a>
<span class="sourceLineNo">032</span>    /**<a name="line.32"></a>
<span class="sourceLineNo">033</span>     * Copy constructor. Performs a shallow copy.<a name="line.33"></a>
<span class="sourceLineNo">034</span>     *<a name="line.34"></a>
<span class="sourceLineNo">035</span>     * @param other instance to copy<a name="line.35"></a>
<span class="sourceLineNo">036</span>     */<a name="line.36"></a>
<span class="sourceLineNo">037</span>    public Diffs(Diffs other) {<a name="line.37"></a>
<span class="sourceLineNo">038</span>        super(other);<a name="line.38"></a>
<span class="sourceLineNo">039</span>    }<a name="line.39"></a>
<span class="sourceLineNo">040</span><a name="line.40"></a>
<span class="sourceLineNo">041</span>    /**<a name="line.41"></a>
<span class="sourceLineNo">042</span>     * Add a difference without any sub-differences.<a name="line.42"></a>
<span class="sourceLineNo">043</span>     *<a name="line.43"></a>
<span class="sourceLineNo">044</span>     * @param description description of the difference<a name="line.44"></a>
<span class="sourceLineNo">045</span>     * @throws IllegalArgumentException if {@code description} is null<a name="line.45"></a>
<span class="sourceLineNo">046</span>     */<a name="line.46"></a>
<span class="sourceLineNo">047</span>    public void add(String description) {<a name="line.47"></a>
<span class="sourceLineNo">048</span>        this.add(description, null);<a name="line.48"></a>
<span class="sourceLineNo">049</span>    }<a name="line.49"></a>
<span class="sourceLineNo">050</span><a name="line.50"></a>
<span class="sourceLineNo">051</span>    /**<a name="line.51"></a>
<span class="sourceLineNo">052</span>     * Add a difference with optional sub-differences.<a name="line.52"></a>
<span class="sourceLineNo">053</span>     *<a name="line.53"></a>
<span class="sourceLineNo">054</span>     * @param description description of the difference<a name="line.54"></a>
<span class="sourceLineNo">055</span>     * @param diffs sub-differences, or null for none<a name="line.55"></a>
<span class="sourceLineNo">056</span>     * @throws IllegalArgumentException if {@code description} is null<a name="line.56"></a>
<span class="sourceLineNo">057</span>     */<a name="line.57"></a>
<span class="sourceLineNo">058</span>    public void add(String description, Diffs diffs) {<a name="line.58"></a>
<span class="sourceLineNo">059</span>        if (description == null)<a name="line.59"></a>
<span class="sourceLineNo">060</span>            throw new IllegalArgumentException("null description");<a name="line.60"></a>
<span class="sourceLineNo">061</span>        this.put(description, diffs);<a name="line.61"></a>
<span class="sourceLineNo">062</span>    }<a name="line.62"></a>
<span class="sourceLineNo">063</span><a name="line.63"></a>
<span class="sourceLineNo">064</span>    /**<a name="line.64"></a>
<span class="sourceLineNo">065</span>     * Format this instance as a {@link String}.<a name="line.65"></a>
<span class="sourceLineNo">066</span>     */<a name="line.66"></a>
<span class="sourceLineNo">067</span>    @Override<a name="line.67"></a>
<span class="sourceLineNo">068</span>    public String toString() {<a name="line.68"></a>
<span class="sourceLineNo">069</span>        if (this.isEmpty())<a name="line.69"></a>
<span class="sourceLineNo">070</span>            return "no differences";<a name="line.70"></a>
<span class="sourceLineNo">071</span>        final StringBuilder buf = new StringBuilder();<a name="line.71"></a>
<span class="sourceLineNo">072</span>        this.format(buf, 0);<a name="line.72"></a>
<span class="sourceLineNo">073</span>        return buf.toString().trim();<a name="line.73"></a>
<span class="sourceLineNo">074</span>    }<a name="line.74"></a>
<span class="sourceLineNo">075</span><a name="line.75"></a>
<span class="sourceLineNo">076</span>    private void format(StringBuilder buf, int depth) {<a name="line.76"></a>
<span class="sourceLineNo">077</span>        final String indent = this.getIndent(depth);<a name="line.77"></a>
<span class="sourceLineNo">078</span>        for (Map.Entry&lt;String, Diffs&gt; entry : this.entrySet()) {<a name="line.78"></a>
<span class="sourceLineNo">079</span>            final String description = entry.getKey();<a name="line.79"></a>
<span class="sourceLineNo">080</span>            buf.append(String.format("%s%s%n", indent,<a name="line.80"></a>
<span class="sourceLineNo">081</span>              description.trim().replaceAll("(\\r?\\n)", "$1" + Matcher.quoteReplacement(indent))));<a name="line.81"></a>
<span class="sourceLineNo">082</span>            final Diffs child = entry.getValue();<a name="line.82"></a>
<span class="sourceLineNo">083</span>            if (child != null)<a name="line.83"></a>
<span class="sourceLineNo">084</span>                child.format(buf, depth + 1);<a name="line.84"></a>
<span class="sourceLineNo">085</span>        }<a name="line.85"></a>
<span class="sourceLineNo">086</span>    }<a name="line.86"></a>
<span class="sourceLineNo">087</span><a name="line.87"></a>
<span class="sourceLineNo">088</span>    private String getIndent(int depth) {<a name="line.88"></a>
<span class="sourceLineNo">089</span>        final char[] indent = new char[depth * 2];<a name="line.89"></a>
<span class="sourceLineNo">090</span>        Arrays.fill(indent, ' ');<a name="line.90"></a>
<span class="sourceLineNo">091</span>        return new String(indent) + "-&gt; ";<a name="line.91"></a>
<span class="sourceLineNo">092</span>    }<a name="line.92"></a>
<span class="sourceLineNo">093</span>}<a name="line.93"></a>
<span class="sourceLineNo">094</span><a name="line.94"></a>




























































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